Measurement
Length, mass, capacity, area, perimeter and volume, with real tools and units.
Lessons
Measure It: Length, Time and Mass in the Real World
Whose foot is the right ruler? How long is a minute, really? Is a kilogram of feathers lighter than a kilogram of rocks? Four lessons where students measure length, time and mass with real tools, then use their own data to settle an argument.
Fence It, Fill It: Area and Perimeter
Which mat is really the biggest? Does the same fence always hold the same garden? Can the same rug need more edging? Four lessons where students tile, stretch rope and chalk the schoolyard to find out that area and perimeter measure different things.
Online practice
- Flat or solid shapes Year 1
- Count the sides of flat shapes Year 1
- Count the faces of solid shapes Year 1
- Which is longer or shorter Year 1
- Compare lengths Year 2
- Length in units from zero Year 2
- Answer questions about a data table Year 2
- Shadow length through the day Year 2
- Day length in seasons Year 2
- Measure a shadow Year 2
- Length from a ruler that does not start at zero Year 3
- How much longer Year 3
- Add lengths Year 3
- Jump on a number line Year 3
- Answer questions about a data table Year 3
- Measure weather change Year 3
- Measure a plant Year 3
- Compare mass Year 3
- Convert metres and centimetres Year 4
- Convert centimetres and millimetres Year 4
- Area of rectangles Year 4
- Area of squares Year 4
- Area from rows of unit squares Year 4
- Perimeter of rectangles Year 4
Free tools
Area and Perimeter Builder
Draw shapes on a square grid and watch the area and perimeter count up. Challenges ask for shapes with the same area but different perimeters.
Measurement Converter
Convert length, mass, volume, temperature and time between metric and imperial units, with the working shown and a sense-of-size picture for each.